We have had charts similar to this before, but this one takes it above and beyond the past ones. All the mane cast characters are painstakingly timed from every episode. Based on the captions, he factored pretty much every single aspect of a characters appearance.
I'm surprised Applejack had so much air time, considering she really didn't have a huge presence overall in season one. Twilight is pretty obvious though!
Anyway, check out his DA page here if you want to thank him!